An achlamydeous (naked) flower is found in

Options

A. head
B. cyathium
C. umbel
D. hypanthodium

Answer

To answer the question "An achlamydeous (naked) flower is found in," we will follow these steps:

### Step-by-Step Solution:

1. **Understanding Achlamydeous Flowers**:
- An achlamydeous flower is defined as a flower that lacks both calyx (sepals) and corolla (petals). This means that the flower does not have the typical outer floral structures that are usually present in most flowers.

2. **Identifying the Options**:
- The options provided are:
1. Head
2. Cyathium
3. Umbel
4. Hypanthodium

3. **Analyzing Each Option**:
- **Head**: This is a type of inflorescence where flowers are densely packed, typically seen in plants like sunflowers. It usually has both calyx and corolla.
- **Cyathium**: This is a specialized type of inflorescence found in plants like Euphorbia. It consists of a cup-shaped structure that contains a single female flower surrounded by several male flowers. Importantly, the flowers in a cyathium are achlamydeous, meaning they lack calyx and corolla.
- **Umbel**: This is a type of inflorescence where flower stalks arise from a common point, resembling an umbrella. Umbels typically have both calyx and corolla.
- **Hypanthodium**: This is a type of inflorescence found in figs, where the flowers are enclosed within a fleshy receptacle. These flowers also usually have calyx and corolla.

4. **Conclusion**:
- Based on the analysis, the correct answer is **Cyathium**, as it is the only option that specifically describes a structure where achlamydeous flowers are found.

### Final Answer:
An achlamydeous (naked) flower is found in **Cyathium**.

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